From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-8.7 required=3.0 tests=DKIM_INVALID,DKIM_SIGNED, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY, SPF_PASS,URIBL_BLOCKED,USER_AGENT_GIT autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id E7517C04A6B for ; Wed, 8 May 2019 15:21:43 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 19CA9214AF for ; Wed, 8 May 2019 15:21:42 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=fail reason="signature verification failed" (2048-bit key) header.d=fpond.eu header.i=@fpond.eu header.b="HOv8Yx4s" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726545AbfEHPVm (ORCPT ); Wed, 8 May 2019 11:21:42 -0400 Received: from mo4-p00-ob.smtp.rzone.de ([81.169.146.216]:13560 "EHLO mo4-p00-ob.smtp.rzone.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726163AbfEHPVm (ORCPT ); Wed, 8 May 2019 11:21:42 -0400 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; t=1557328900; s=strato-dkim-0002; d=fpond.eu; h=Message-Id:Date:Subject:Cc:To:From:X-RZG-CLASS-ID:X-RZG-AUTH:From: Subject:Sender; bh=PqBZE6NhWzosKKTY8fgyr23SwEQXuP4OhdOutYbtHlU=; b=HOv8Yx4sy1h+yO0vk80Yw3KE7UyfOgLTFm3TfTAWUXrlvBSW107JBnTnlZyWrfoAyp saQuNqjkhDHygZ9otVFeIZxmKEPK1b9UX94VjwpOv/vsYxTV6T5X02JQ+SD6H8TkSr0s A/GRpO4BCkzcrGG0HwxLtkjA6U+vlMGnevxsuyfrsE15iLlF+9OnLScSQmbW14fmrz6n dtzl4eW8uefKLhIvkA7DRdFj7+h1yKF2j2BCjsTic/R/jHdBoBg+3aMhkI3nb8QLGnUF /G808NiP1r4KNWlpPrQ/e1LXfX3Ni3yjME+MqE6saTs2L1offJLuW8W1rj5Sgv6sAO0/ xN/A== X-RZG-AUTH: ":OWANVUa4dPFUgKR/3dpvnYP0Np73dmm4I5W0/AvA67Ot4fvR82Fdd8U4C/c=" X-RZG-CLASS-ID: mo00 Received: from groucho.site by smtp.strato.de (RZmta 44.18 DYNA|AUTH) with ESMTPSA id y08c83v48FLNUG2 (using TLSv1.2 with cipher ECDHE-RSA-AES256-SHA (curve secp521r1 with 521 ECDH bits, eq. 15360 bits RSA)) (Client did not present a certificate); Wed, 8 May 2019 17:21:23 +0200 (CEST) From: Ulrich Hecht To: linux-renesas-soc@vger.kernel.org Cc: netdev@vger.kernel.org, davem@davemloft.net, wsa@the-dreams.de, horms@verge.net.au, magnus.damm@gmail.com, Ulrich Hecht Subject: [PATCH] ravb: implement MTU change while device is up Date: Wed, 8 May 2019 17:21:22 +0200 Message-Id: <1557328882-24307-1-git-send-email-uli+renesas@fpond.eu> X-Mailer: git-send-email 2.7.4 Sender: linux-renesas-soc-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-renesas-soc@vger.kernel.org Uses the same method as various other drivers: shut the device down, change the MTU, then bring it back up again. Tested on Renesas D3 Draak board. Signed-off-by: Ulrich Hecht --- drivers/net/ethernet/renesas/ravb_main.c | 11 +++++++---- 1 file changed, 7 insertions(+), 4 deletions(-) diff --git a/drivers/net/ethernet/renesas/ravb_main.c b/drivers/net/ethernet/renesas/ravb_main.c index ef8f089..02c247c 100644 --- a/drivers/net/ethernet/renesas/ravb_main.c +++ b/drivers/net/ethernet/renesas/ravb_main.c @@ -1810,13 +1810,16 @@ static int ravb_do_ioctl(struct net_device *ndev, struct ifreq *req, int cmd) static int ravb_change_mtu(struct net_device *ndev, int new_mtu) { - if (netif_running(ndev)) - return -EBUSY; + if (!netif_running(ndev)) { + ndev->mtu = new_mtu; + netdev_update_features(ndev); + return 0; + } + ravb_close(ndev); ndev->mtu = new_mtu; - netdev_update_features(ndev); - return 0; + return ravb_open(ndev); } static void ravb_set_rx_csum(struct net_device *ndev, bool enable) -- 2.7.4